jquery: calling a function from variable with variable

Question

How to call back a function which is defined in a variable(I did this)... More than this how to pass variable into that function(which is also defined as variable)

Example: Functionvariable,variable are variables....

function ffunction(Functionvariable,variable){
     Functionvariable(variable); //This is actually not working...how to do this...
}

I tried this,

function ffunction(Functionvariable,variable){
     eval(Functionvariable + '('+ variable + ')'); //no luck
}

This is worked...

function ffunction(Functionvariable,variable){
         eval(Functionvariable)(variable);
    }

I hope that your arg is not called Function because Function has a special meaning in javascript — Emil Condrea
– Emil Condrea, Commented Mar 25, 2014 at 7:36
Your first example is correct, if you're trying to do what it looks like. ffunction(alert, 3) will alert 3. — David Hedlund
– David Hedlund, Commented Mar 25, 2014 at 7:37
take this for example: var g = function(){alert("called")};function f2(fn,v){fn(v)};f2(g,1) This is the same example as yours but it works — Emil Condrea
– Emil Condrea, Commented Mar 25, 2014 at 7:40

ElmoVanKielmo · Accepted Answer · 2014-03-25 07:47:02Z

2

Just avoid reserved words and you shall be fine with your first solution.
Here is the fiddle http://jsfiddle.net/6R3ye/

function dummy(func, v){
    eval(func)(v);
};
var f = 'alert';
var x = 'abc';
dummy(f, x);

edited Mar 25, 2014 at 7:47

answered Mar 25, 2014 at 7:41

ElmoVanKielmo

11.4k2 gold badges35 silver badges51 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Anish Charles Over a year ago

I mentioned.. func here is also variables... I am passing some name as variable....

ElmoVanKielmo Over a year ago

Now it's what you want

ElmoVanKielmo Over a year ago

@AnishCharles it was a bit hard to understand what you mean, because variable can also hold function instance. Please accept the answer and possibly upvote. Good luck.

user3450613 · Accepted Answer · 2014-03-25 08:10:20Z

0

I gathered 4 methods you can use, with 1 or more params

And a fiddle

function ffunction(fn, p1, p2) {
  console.log("ffunction is calling \n" + fn.toString() + "\nwith " + p1.toString());

  eval(fn)(p1, p2);
  fn(p1, p2);
  fn.call(fn, p1, p2);
  fn.apply(fn, [p1, p2]);
}

function f1(p1, p2){
  console.log("f1 got " + p1.toString() + " and " + p2.toString());
}

ffunction(f1, 'foo', 'bar');

answered Mar 25, 2014 at 8:10

user3450613

213 bronze badges

1 Comment

ElmoVanKielmo Over a year ago

You haven't read the comments. Only your first solution will work if fn holds the name of the function as a string. The problem is already solved. @Anish please accept the working answer.

Collectives™ on Stack Overflow

jquery: calling a function from variable with variable

2 Answers 2

3 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related